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Scheduling Timed Modules for Correct Resource Sharing

Fulltext:


Authors:

Cristina Seceleanu, Paul Pettersson, Hans Hansson

Research group:

Formal Modelling and Analysis of Embedded Systems

Publication Type:

Conference/Workshop Paper

Venue:

In Proc. of the 1st IEEE International Conference on Software Testing, Verification and Validation (ICST 2008)

Publisher:

IEEE Computer Society

Abstract

Real-time embedded systems typically include concurrent tasks of different priorities with time-dependent operations accessing common resources. In this context, unsynchronized parallel executions may lead to hazard situations caused by e.g., race conditions. To be able to detect such faulty system behaviors before implementation, we introduce a unified model of resource constrained, scheduled real-time system descriptions, in Alur’s and Henzinger’s rigorous framework of timed reactive modules. We take a component-based design perspective and construct the real-time system model, by refinement, as a composition of real-time periodic preemptible tasks with encoded functionality, and a fixed-priority scheduler, all modeled as timed modules. For the model, we express the notions of race condition and redundant locking, formally, as invariance properties that can be verified by model-checking.

Bibtex

@inproceedings{Seceleanu1169,
author = {Cristina Seceleanu and Paul Pettersson and Hans Hansson},
title = {Scheduling Timed Modules for Correct Resource Sharing},
month = {April},
year = {2008},
booktitle = {In Proc. of the 1st IEEE International Conference on Software Testing, Verification and Validation (ICST 2008)},
publisher = {IEEE Computer Society},
url = {http://www.es.mdu.se/publications/1169-}
}